Jhonny Peralta returned from a PED suspension to have a strong postseason, and then signed a four-year, $53 million deal with the St. Louis Cardinals. / Robert Deutsch, USA TODAY Sports

by Christine Brennan, USA TODAY Sports

by Christine Brennan, USA TODAY Sports

Major League Baseball's modified drug policy, which is yet to be finalized, will bar from the postseason any player disciplined for performance-enhancing drug use during the regular season, a person with direct knowledge of the negotiations told USA TODAY Sports.

The person spoke on condition of anonymity because negotiations to modify the collective bargaining agreement are ongoing.

Had that policy been in effect during the 2013 season, Detroit Tigers shortstop Jhonny Peralta would have been ineligible for the postseason. Peralta, who moved to the outfield for the playoffs, batted .417 and drove in five runs in the Tigers' five-game victory over the Oakland Athletics in the AL Division Series.

Peralta was suspended 50 games for his role in the Biogenesis doping scandal, but returned for the final week of the regular season and the playoffs. Texas Rangers outfielder Nelson Cruz served a similar suspension and would have been eligible for the postseason, but the Rangers lost a one-game tiebreaker (technically a regular season game) against the Tampa Bay Rays.

Peralta signed a four-year, $53 million deal with the St. Louis Cardinals in November.

In the new agreement, a player would face a postseason ban even if the player had returned from his suspension before the postseason.

Baseball's revamped drug policy is expected to increase penalties for first-time offenders from 50 to 80 games and bar second offenders for an entire season - 162 games - rather than 100 games.